Spa chair



FIG. 1 is a top perspective view of the spa chair;

FIG. 2 is a side perspective of the spa chair; and,

FIG. 3 is a side perspective of an alternate embodiment of the spa chair.

The broken lines are for illustrative purposes only and form no part of the claimed ornamental design. 

I claim the ornamental design for a spa chair, as shown and described. 